These tools will no longer be maintained as of December 31, 2024. Archived website can be found here. PubMed4Hh GitHub repository can be found here. Contact NLM Customer Service if you have questions.


Pubmed for Handhelds

PUBMED FOR HANDHELDS

Search MEDLINE/PubMed

  • Title: Recombinant alpha 1-antitrypsin Pittsburgh (Met 358----Arg) is a potent inhibitor of plasma kallikrein and activated factor XII fragment.
    Author: Schapira M, Ramus MA, Jallat S, Carvallo D, Courtney M.
    Journal: J Clin Invest; 1986 Feb; 77(2):635-7. PubMed ID: 3484756.
    Abstract:
    In normal plasma, the serine protease inhibitor alpha 1-antitrypsin (alpha 1-AT) plays little or no role in the control of plasma kallikrein or activated Factor XII fragment (Factor XIIf), this function being performed by Cl-inhibitor. Recently, an alpha 1-AT variant was described with a Met----Arg mutation at the reactive center P1 residue (position 358) which altered the specificity of inhibition from the Met- or Val-specific protease neutrophil elastase to thrombin, an Arg-specific protease. We have now examined the inhibition of plasma kallikrein and Factor XIIf, both Arg-specific enzymes, with recombinant alpha 1-AT(Met358----Arg) produced by an Escherichia coli strain carrying a mutated human alpha 1-AT gene. The engineered protein was a very efficient inhibitor of both enzymes. It was more effective than Cl-inhibitor by a factor of 4.1 for kallikrein and 11.5 for Factor XIIf. These results suggest that recombinant alpha 1-AT(Met358----Arg) has therapeutic potential for disease states where activation of the plasma kinin-forming system is observed, for example in hereditary angioedema or septic shock.
    [Abstract] [Full Text] [Related] [New Search]